Const
Accessible disclosure button for the group row. Rendered as a real <button> so keyboard/AT users get proper focus, aria-expanded, and Enter/Space semantics. The outer <tr> intentionally carries no ARIA role — the <tr> is still a row.
<button>
aria-expanded
<tr>
Accessible disclosure button for the group row. Rendered as a real
<button>so keyboard/AT users get proper focus,aria-expanded, and Enter/Space semantics. The outer<tr>intentionally carries no ARIA role — the<tr>is still a row.